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INCOME TAXES (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 30, 2019 | Sep. 29, 2018 | Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017 | Sep. 28, 2019 | Oct. 01, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign |  |  | $ 110,600 |  |  | $ 110,600 |
Excess tax benefits from stock based compensation |  |  |  |  | $ (4,392) |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Statutory tax rate |  | 35.00% | 21.00% |  |  |  |
Tax Cuts And Jobs Act, income tax expense (benefit) |  |  | $ 9,400 |  |  | 114,000 |
Tax Cuts And Jobs Act, re-measurement of deferred taxes and liabilities, income tax expense |  |  | 5,500 | $ 2,800 |  |  |
Tax Cuts And Jobs Act, reassessment of undistributed foreign earnings no longer deemed to be to be indefinitely reinvested outside of U.S. | $ 700 |  |  |  |  | 1,800 |
Tax Cuts And Jobs Act, tax for accumulated foreign earnings |  |  |  |  |  | 111,200 |
Tax incentive arrangement, benefit to income tax provision |  |  | $ 5,000 | $ 20,400 | $ 23,300 |  |
Tax incentive arrangement, benefit to income tax provision, earnings per share impact (in dollars per share) |  |  | $ 0.08 | $ 0.29 | $ 0.33 |  |
Remeasurement of deferred taxes |  |  | $ 5,480 | $ 2,760 | $ 0 |  |
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions |  |  | 523 | 506 | 882 |  |
Unrecognized Tax Benefits |  | $ 13,038 | 12,925 | 13,038 | 12,062 | 12,925 | $ 7,453
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |  |  | 146,500 |  |  | 146,500 |
U.S. one-time transition tax |  |  | 9,369 | 101,854 | $ 0 |  |
Unrecognized tax benefit that if recognized would impact effective tax rate |  |  | 13,100 |  |  | 13,100 |
Unrecognized tax benefits, accrued interest and penalties |  |  | 1,400 |  |  | 1,400 |
Deferred Tax Assets, Operating Loss Carryforwards, Domestic |  |  | $ 7,800 |  |  | $ 7,800 |
Minimum [Member] |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Operating Loss Carryforward, Foreign, Statute Of Limitions |  |  | 4 years |  |  |  |
Minimum [Member] | Operations In Singapore And Malaysia [Member] |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential |  |  |  |  | 0.00% |  |
Maximum [Member] |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Operating Loss Carryforward, Foreign, Statute Of Limitions |  |  | 6 years |  |  |  |
Pennsylvania Tax Law [Member] |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local |  | $ 0 |  | $ 0 | $ 4,000 |  | $ 4,000

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